GU Tao1, LIAN Dong-xiao1, QIN Fu-hai1, ZHOU Yong-jun2, DU Peng-peng2
（1. School of Materials Science and Engineering, North University of China, Taiyuan 030051, China； 2. Taigu XinKanaifu Plumbing Equipment Co. Ltd., Taigu 030800, China）
Abstract： The filling and solidification of a malleable iron pipe casting manufactured by DISA casting mold line with different design parameters were calculated by using software MAGMASOFT. Then the shrinkage porosity was predicted by thermal criterion. Based on the simulation results, the influences of the runner ratio and feeder position on the porosity were discussed. The results show that synchronization of injection can be significantly influenced by the size of downsprue section, and an design structure of DISA gating system was used to solve the problem of flow imbalance in the filling process. At the same time, the riser was designed on the hotspot for feeding shrinkage. At last, the optimizated gating system and feeding system were accomplished to eliminate shrinkage porosity.
Key words： DISA casting mold line; malleable iron pipe casting; shrinkage porosity; numerical simulation
CLD number： TG115.21Document code： A
Article ID： 1674-8042（2017）02-0119-06 doi： 10.3969/j.issn.1674-8042-2017-02-003
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数值模拟优化DISA薄壁铸铁管铸造工艺参数
顾涛1, 连冬晓1, 覃福海1, 周永军2, 杜鹏鹏2
（1. 中北大学 材料科学与工程学院， 山西 太原 030051； 2. 卡耐夫铸管有限公司， 山西 太谷 030800）
摘要:采用MAGMASOFT软件， 对迪砂线（DISA）生产条件下、 不同设计参数玛钢管件的充型和凝固进行了数值模拟计算， 并通过热判据对疏松缺陷进行了判定。 基于数值模拟结果， 讨论了浇道设计比率和冒口位置对疏松的影响规律。 结果表明， 直浇道截面尺寸对充型顺序影响显著， 可通过锥形直浇道设计和多个截面的内浇道合理匹配来解决流量不平衡问题。 同时， 在热节处设置冒口用于铸件的补缩。 通过优化设计浇注系统和冒口系统最终消除了铸件的缩松缺陷。
关键词:迪砂线； 玛钢管件； 缩孔； 数值模拟
引用格式：GU Tao, LIAN Dong-xiao, QIN Fu-hai, et al. Optimized DISA system parameters of a thin-wall malleable iron pipe casting by numerical simulation. Journal of Measurement Science and Instrumentation, 2017, 8(2)： 119-124. ［doi： 10.3969／j.issn.1674-8042.2017-02-003］
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